WO2018003854A1

WO2018003854A1 - Intraocular lens insertion tool

Info

Publication number: WO2018003854A1
Application number: PCT/JP2017/023749
Authority: WO
Inventors: 義崇渡辺; 和徳工藤
Original assignee: Hoya株式会社
Priority date: 2016-06-28
Filing date: 2017-06-28
Publication date: 2018-01-04
Also published as: CN109414344A; JP6929843B2; US20190151078A1; EP3476375A4; JPWO2018003854A1; US11033382B2; AU2017288642B2; SG11201811530UA; KR102431211B1; EP3476375B1; EP3476375A1; AU2017288642A1; KR20190021237A; CN109414344B; BR112018077142A2

Abstract

The present invention comprises: a hollow body that is formed by an insertion tool main body 5 and an insertion tube 7 attached to a tip end section thereof, said insertion tool main body 5 having a lens mounting section to which an intraocular lens is mounted; a rotation member 8 that has a first threaded section formed therein and is attached to a rear end section of the insertion tool main body 5 forming the hollow body, so as to rotate freely in a direction around an axis thereof; a plunger 9 that has a second threaded section formed therein and shifts an interior section of the hollow body in an axial direction thereof; and a rod 10 that, along with the plunger 9, shifts the interior section of the hollow body in the axial direction of the hollow body, thereby pushing the intraocular lens out from the lens mounting section. A tip end side of the plunger 9 is inserted into the interior section of the hollow body with the first threaded section and the second threaded section 9c meshed, and a rear end side of the plunger 9 is positioned protruding further rearward than the rotation member 8.

Description

Intraocular lens inserter

The present invention relates to an intraocular lens inserter used when an intraocular lens is inserted into an eyeball (intraocular).

In cataract surgery, removal of the turbid lens by ultrasonic emulsification and implantation in the eye after removal of the lens are widely performed. At present, a soft intraocular lens made of a soft material such as silicone elastomer is inserted into the eye using an intraocular lens inserter. As this type of intraocular lens inserter, for example, those described in

Patent Documents

1 and 2 are known.

The intraocular lens inserter described in Patent Document 1 is configured such that a plunger engaged with a screw body and a screw moves in the axial direction of the inserter body by rotating a rotating member connected to the inserter body. ing. Further, a rod is connected to the plunger, and the intraocular lens set in the inserter body is pushed out at the tip of the rod. In the following description, a method of pushing out the intraocular lens by a rotating operation of a rotating member or the like is referred to as a screw method.

On the other hand, the intraocular lens inserter described in Patent Document 2 is configured to move the plunger in the axial direction of the inserter body by pushing the plunger against the inserter body. Further, a rod is connected to the plunger, and the intraocular lens set in the inserter body is pushed out at the tip of the rod. In the following description, a method of pushing out the intraocular lens by a pushing operation of a plunger or the like is referred to as a push method.

Japanese Patent Laying-Open No. 2015-177845 Japanese Unexamined Patent Publication No. 2016-87336 Japanese Patent Laid-Open No. 2003-210498

The above-mentioned screw method and push method are different in usability. For example, in the case of the screw method, since the rod moves according to the rotation of the rotating member, there is an advantage that it is easy to control the moving amount and moving speed of the rod when pushing out the intraocular lens. In the case of the push method, since the plunger can be pushed in by holding the intraocular lens inserter with one hand, there is an advantage that the free hand can be used for another purpose (for example, the purpose of pressing the eyeball). For this reason, among users (operators such as ophthalmologists) who use an intraocular lens inserter for performing cataract surgery, there are users who prefer the screw method and users who prefer the push method. Therefore, in order to respond to each user's preference, it is necessary to have both intraocular lens inserters of different methods.

On the other hand, Patent Document 3 describes an intraocular lens insertion device including a device main body, an extrusion shaft, and a screw cylinder. In this intraocular lens insertion device, a male screw is formed on the device main body, and a female screw is formed on the extrusion shaft. When the screw cylinder is rotated (rotated), the extrusion shaft moves by meshing (screwing) of the male screw and the female screw, and when the end portion of the extrusion shaft is pressed (pressed), the extrusion shaft is also moved. Is configured to move.

However, the intraocular lens insertion device described in Patent Document 3 has the following points to be improved. That is, the screw cylinder is attached near the end of the extrusion shaft so as to rotate independently of the extrusion shaft. In the initial state before use, the inserter body and the screw cylinder are in the axial direction of the extrusion shaft. Are located apart. For this reason, when the push-out shaft is pushed in so as to be operated by the push method, the male screw of the instrument body and the female screw of the screw cylinder come into contact (collision) during the operation. Then, at the moment when the male screw and the female screw come into contact with each other, vibration or impact occurs in the intraocular lens insertion device, which may cause the position of the intraocular lens to deviate from the normal position. Further, in order to operate with the screw method, it is necessary to push the distal end portion of the extrusion shaft forward and engage the male screw with the female screw, that is, push-in operation. In other words, the intraocular lens insertion device described in Patent Document 3 has a method of substantially using both the pushing operation of the push shaft and the rotating operation of the screw cylinder, and the intraocular lens cannot be pushed out only by the rotating operation. .

The main object of the present invention is compatible with both the push type and the screw type, and is less likely to generate vibration when operated by the push type. It is an object of the present invention to provide an intraocular lens inserter that can extrude.

(First aspect)
The first aspect of the present invention is:
A hollow body having a lens installation part in which an intraocular lens is installed;
A rotating member attached to the rear end of the hollow body so as to be rotatable about the axis of the hollow body;
A second threaded portion is formed, and a plunger that moves inside the hollow body in the axial direction of the hollow body;
A pushing member that pushes out the intraocular lens from the lens installation portion by moving the inside of the hollow body together with the plunger in the axial direction of the hollow body,
With
The front end side of the plunger is inserted into the hollow body with the first screw portion and the second screw portion meshing with each other, and the rear end side of the plunger protrudes rearward from the rotating member. It is an intraocular lens inserter arranged in a state.
(Second aspect)
The second aspect of the present invention is:
The hollow body is the intraocular lens inserter according to the first aspect, which includes a rotation restricting portion that restricts rotation of the plunger.
(Third aspect)
The third aspect of the present invention is:
The hollow body is the intraocular lens inserter according to the first or second aspect, wherein the hollow body has a retaining portion that prevents the plunger from slipping out of the hollow body.
(Fourth aspect)
The fourth aspect of the present invention is:
The intraocular lens inserter according to any one of the first to third aspects, wherein a taper angle behind the second screw portion is 5 ° or more and 15 ° or less.
(5th aspect)
The rotation restricting portion is rotatably provided so as to open and close an opening formed in the outer wall of the hollow body,
The intraocular lens inserter according to the second aspect, in which at least a part of the rotation restricting portion is shielded by the rotating member.
(Sixth aspect)
The intraocular lens inserter according to any one of the first to fifth aspects, wherein a pressing plate portion is provided at a rear end portion of the plunger.
(Seventh aspect)
The fifth aspect of the present invention is:
The intraocular lens insertion device according to any one of the first to sixth aspects, wherein an intraocular lens is installed in the lens installation unit.

According to the present invention, it is possible to cope with both the push type and the screw type, and when the push type is operated, vibration or the like is hardly generated. When the screw type is operated, the intraocular lens is pushed out only by the rotation operation. It becomes possible.

It is a perspective view which shows the structural example of the intraocular lens insertion device which concerns on 1st Embodiment of this invention. (A) is a plan view showing a configuration example of an intraocular lens inserter according to the first embodiment of the present invention, (B) is a side view, and (C) is an E1-E1 sectional view in (A). It is a perspective view which shows the structure of an inserter main body. (A) is a side view showing the configuration of the inserter body, (B) is a cross-sectional view taken along line F1-F1 in (A), and (C) is an enlarged view of a portion F2 in (B). (A) is a perspective view which shows the insertion device main body of the state which opened the rotation control part, (B) is a G arrow line view in (A). It is a perspective view which shows the structure and arrangement | positioning of the front-end | tip part of an inserter main body. The structure of an insertion cylinder is shown, (A) is a top view, (B) is a side view, (C) is a bottom view. FIG. 8 is a cross-sectional view taken along line HH in FIG. It is a perspective view which shows the structure of an attachment member. It is a three-view figure which shows the structure of an attachment member, Comprising: (A) is a top view, (B) is a side view, (C) is a rear view. The state which attached the attachment member to the insertion cylinder is shown, (A) is a top view, (B) is a side view, (C) is a bottom view. The preferable example at the time of using an attachment member is shown, (A) is sectional drawing seen from the axial direction, (B) is sectional drawing seen from the direction orthogonal to an axial direction. (A)-(C) is a figure explaining the procedure of attachment and removal of an attachment member, respectively. It is the E5 section enlarged view in FIG. FIG. 3 is an E2-E2 sectional view in FIG. 2. 2A is a cross-sectional view taken along line E3-E3 in FIG. 2, and FIG. 2B is a cross-sectional view taken along line E4-E4 in FIG. It is a figure explaining the function of an attachment member. It is a figure which shows the example which changes the protrusion amount of a nozzle member. It is a perspective view which shows the state which attached the attachment member to the insertion cylinder in the intraocular lens insertion device which concerns on 2nd Embodiment of this invention. It is a perspective view which shows the structure of the insertion cylinder which concerns on 2nd Embodiment of this invention. It is a perspective view which shows the structure of the attachment member which concerns on 2nd Embodiment of this invention. The structure of the attachment member which concerns on 2nd Embodiment of this invention is shown, (A) is a top view, (B) is a side view, (C) is a bottom view, (D) is a rear view. The state which attached the attachment member to the insertion cylinder is shown, (A) is a top view, (B) is a side view, (C) is a bottom view. (A) is a J2-J2 cross-sectional view in FIG. 23, (B) is a J1-J1 cross-sectional view in FIG. 23, and (C) is an enlarged view of a portion K in (B). (A) is a side view showing a state where the engagement hole is engaged with the rear engagement hole, and (B) is a side view showing a state where the engagement hole is engaged with the center engagement hole. FIG. 6C is a side view showing a state in which the engagement hole is engaged with the front engagement hole. It is a perspective view which shows the structure of the intraocular lens insertion device which concerns on 3rd Embodiment of this invention. (A) is a plan view showing a configuration of an intraocular lens inserter according to a third embodiment of the present embodiment, (B) is a side view, and (C) is a cross-sectional view taken along line MM in (A). It is a perspective view which shows the structure of the inserter main body which concerns on 3rd Embodiment of this invention, (A) is the state which opened the rotation control part provided in an inserter main body, (B) is the state which closed the rotation control part. Is shown. The structure of the insertion cylinder which concerns on 3rd Embodiment of this invention is shown, (A) is a top view, (B) is a side view, (C) is a bottom view. (A) is the perspective view which looked at the insertion cylinder which concerns on 3rd Embodiment of this invention from diagonally upward, (B) is the perspective view which looked from diagonally downward. It is the perspective view which looked at the attachment member which concerns on 3rd Embodiment of this invention from diagonally upward, (A) shows the attachment member before attaching to an insertion cylinder, (B) shows the attachment member after attaching to an insertion cylinder. ing. The structure of the attachment member which concerns on 3rd Embodiment of this invention is shown, (A) is a top view, (B) is a side view, (C) is a bottom view. FIG. 33 is a view on arrow N in FIG. It is a longitudinal cross-sectional view of the attachment member which concerns on 3rd Embodiment of this invention, Comprising: The state which closed the engaging part is shown. It is a perspective view (the 1) which shows the attachment procedure of the attachment member which concerns on 3rd Embodiment of this invention. It is a perspective view (the 2) which shows the attachment procedure of the attachment member which concerns on 3rd Embodiment of this invention. It is a longitudinal cross-sectional view which shows the state which attached the attachment member to the insertion cylinder in 3rd Embodiment of this invention. It is a longitudinal cross-sectional view which shows the state which moved the attachment member attached to the insertion cylinder in the axial direction in 3rd Embodiment of this invention. (A)-(D) is a figure explaining the arrangement | positioning relationship of the plunger and rotation control part in 3rd Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

<Configuration of intraocular lens inserter>
FIG. 1 is a perspective view showing a configuration example of an intraocular lens inserter according to a first embodiment of the present invention. 2A is a plan view showing a configuration example of the intraocular lens inserter according to the first embodiment of the present invention, FIG. 2B is a side view, and FIG. 2C is a cross-sectional view taken along line E1-E1 in FIG. It is.

The intraocular lens insertion device 1 is used when an intraocular lens is inserted into the eye. In this embodiment, as an example of an intraocular lens, a one-piece type intraocular lens 4 (see FIG. 6) made of a soft material such as silicone elastomer or soft acrylic, which has a circular shape that performs an optical function. It is assumed that an intraocular lens 4 having an optical part 4a and two support parts 4b that are curved and extended outward from two locations on the outer periphery of the optical part 4a is handled.

Further, in the present embodiment, in describing the relative positional relationship and operation direction of each part of the intraocular lens inserter 1, one of the X axis directions is the X1 direction, the other is the X2 direction, and the Y axis direction. One of the two is the Y1 direction, the other is the Y2 direction, one of the Z-axis directions is the Z1 direction, the other is the Z2 direction, the X1 direction is the front end side (front), the X2 direction is the rear end side (rear), and the Y1 direction is the left side (Left), Y2 direction is defined as right (right), Z1 direction is defined as upper (upper), and Z2 direction is defined as lower (lower). Among these, the X-axis direction (X1 direction and X2 direction) corresponds to the length direction of the intraocular lens inserter 1, and the Y-axis direction (Y1 direction and Y2 direction) is the width direction of the intraocular lens inserter 1. The Z-axis direction (Z1 direction and Z2 direction) corresponds to the height direction of the intraocular lens inserter 1.

The intraocular lens insertion device 1 includes an insertion device body 5, a slider 6, an insertion tube 7, a rotating member 8, a plunger 9, a rod 10 (see FIG. 2C), and an attachment member 16. It becomes the composition. These constituent elements are preferably each constituted by a resin molded product. The inserter body 5 and the insertion cylinder 7 each have a hollow structure and are connected to each other to form a hollow body. The slider 6 is attached to the inserter body 5. The insertion cylinder 7 is connected to the distal end portion of the inserter body 5. The rotary member 8 is rotatably connected to the rear end portion of the inserter body 5. The plunger 9 is disposed coaxially with the inserter body 5. A part of the plunger 9 is arranged inside the insertion device main body 5 via the rotating member 8, and the other part of the plunger 9 is arranged in a state of protruding rearward from the rotating member 8. The rod 10 is disposed inside a hollow body composed of the inserter body 5 and the insertion tube 7. The attachment member 16 is a member attached to the hollow body so as to provide a predetermined additional function.

(Inserter body)
FIG. 3 is a perspective view showing the configuration of the inserter body. 4A is a side view showing the configuration of the inserter body, FIG. 4B is a cross-sectional view taken along line F1-F1 in FIG. 4A, and FIG. 4C is an enlarged view of a portion F2 in FIG.

The inserter body 5 is formed in a cylindrical shape as a whole. A lens installation portion 11 is provided at the distal end portion of the inserter body 5. The intraocular lens 4 is installed in the lens installation unit 11. The lens installation portion 11 is formed so as to protrude forward from the lower outer peripheral wall of the inserter body 5.

An insertion tube connecting portion 5a is formed on the outer peripheral portion on the distal end side of the inserter body 5. Slits 12 are respectively formed on the left and right sides of the inserter body 5. The slit 12 is formed on the distal end side of the inserter body 5. The slit 12 supports the slider 6 so as to be movable in the axial direction (center axis direction) of the inserter body 5 when the slider 6 is mounted on the inserter body 5.

The rear end of the inserter body 5 opens in a circular shape, and the plunger 9 and the rod 10 can be inserted into the inserter body 5 through this opening. A rotation restricting portion 13, a flange portion 14, and a rotation support portion 15 are formed at the rear end portion of the inserter body 5 and in the vicinity thereof. The rotation restricting portion 13 restricts the rotation of the plunger 9 inserted into the inserter body 5.

FIGS. 4A to 4C show the inserter body with the rotation restricting portion closed. On the other hand, FIG. 5A is a perspective view showing the inserter main body in a state where the rotation restricting portion is opened, and FIG. 5B is a view taken in the direction of arrow G in FIG.
The rotation restricting portion 13 is formed slightly ahead of the flange portion 14. The rotation restricting portion 13 constitutes a part of the outer wall of the inserter body 5 and is provided so as to be rotatable around the pivot portion 13a so as to open and close an opening formed in the outer wall. The rotation restricting portion 13 is formed with a pair of sliding guides 13b, and a concave guide groove 13c is formed between the sliding guides 13b. The pair of sliding guides 13b are arranged in the cylinder of the inserter main body 5 when the rotation restricting portion 13 is closed, and are arranged outside the cylinder of the inserter main body 5 when the rotation restricting portion 13 is opened. Placed in. The closed state of the rotation restricting portion 13 is held, for example, by fitting uneven portions (not shown). Further, when the rotation restricting portion 13 is rotated around the pivotal support portion 13a against the holding force due to the fitting of the unevenness, the rotation restricting portion 13 is opened as shown in FIG. The front end surface of each sliding guide 13b serves as a retaining portion 13d (see FIG. 4C). The retaining portion 13d prevents the plunger 9 from coming out of the insertion device body 5.

When the intraocular lens inserter 1 is operated by the push method, the flange portion 14 is a portion for hooking a finger (usually an index finger and a middle finger) of the user's hand. The rotation support portion 15 is provided slightly behind the flange portion 14. The rotation support portion 15 is formed in a ring shape having a stepped structure protruding in a ring shape.

As shown in FIG. 6, the lens installation unit 11 includes a bottom surface portion 11a, a lens receiving portion 11b, and a lens guide portion 11c. The lens receiving portion 11b receives and supports the intraocular lens 4 from below. The intraocular lens 4 is installed in the lens installation unit 11 in a state where one support portion 4b is disposed on the front side and the other support portion 4b is disposed on the rear side. The intraocular lens insertion device 1 is a preload type in which the intraocular lens 4 is previously installed in the lens installation unit 11 of the insertion device body 5. For this reason, the intraocular lens 4 is one of the components of the intraocular lens inserter 1. However, in carrying out the present invention, the preload type is not necessarily required.

The center part in the width direction of the bottom part 11a is formed to be slightly recessed. The lens receiving portions 11 b are formed on both the left and right sides of the lens installation portion 11. The lens receiving portion 11b is formed one step higher than the bottom surface portion 11a. This is because when the intraocular lens 4 is supported by being placed on the lens receiving portion 11b, the optical portion 4a of the intraocular lens 4 is supported in a floating state from the bottom surface portion 11a without contacting the bottom surface portion 11a. . The lens guide portion 11c is formed on both the left and right sides of the lens installation portion 11 in the same manner as the lens receiving portion 11b. The lens guide portion 11c guides the optical portion 4a of the intraocular lens 4 supported by the lens receiving portion 11b so as to be sandwiched from both the left and right sides. The lens guide portion 11c is formed in a state of standing upright from the lens receiving portion 11b. An inclined surface 11d and a restricting portion 11e are formed at the upper ends of the left and right lens guide portions 11c adjacent to the axial direction of the inserter body 5. The inclined surface 11d is formed so as to be inclined outward so that the lens installation portion 11 can easily receive the intraocular lens 4. 11 d of inclined surfaces are formed in the front end side of the lens installation part 11 rather than the control part 11e in the axial direction of the insertion device main body 5. FIG. The restricting portion 11 e is formed in a state of protruding toward the center side in the width direction of the lens installation portion 11. The restriction part 11e restricts the movable range in the vertical direction of the intraocular lens 4 supported by the lens receiving part 11b.

(Slider)
As shown in FIGS. 1, 2, and 6, the slider 6 includes a lens pressing portion 6 a and a pair of wing portions 6 b. The lens pressing portion 6 a is disposed at the tip end portion of the slider 6, and the pair of wing portions 6 b are disposed in pairs on the left and right sides of the slider 6. When the slider 6 is moved forward, the lens holding portion 6a is disposed so as to advance above the optical portion 4a of the intraocular lens 4 installed in the lens installation portion 11, as shown in FIG. The

The pair of wing portions 6b are arranged outside the outer wall portion of the inserter body 5. When using the intraocular lens inserter 1, the pair of wing portions 6 b are portions to which a user's finger (usually an index finger and a thumb) is applied when the slider 6 is moved in the axial direction of the inserter body 5. Become. The user means an operator such as an ophthalmologist who performs an operation, a nurse who assists the operator, and the like. On the outer surface of each wing portion 6b, irregularities for preventing slippage and marks indicating the moving direction of the slider 6 (triangular arrows in this embodiment) are formed. Further, the outer surface of each wing portion 6b is curved from the rear end side to the front end side so that the user's finger can be easily caught, and irregularities for preventing slipping are formed in the curved portion. .

(Insertion tube)
7A and 7B show the configuration of the insertion tube, where FIG. 7A is a plan view, FIG. 7B is a side view, and FIG. 7C is a bottom view. FIG. 8 is a cross-sectional view taken along the line HH in FIG.
The insertion tube 7 is used to guide the intraocular lens 4 by folding it into the eye when the intraocular lens 4 installed in the lens installation unit 11 is inserted into the eye. The insertion tube 7 is formed of a transparent or translucent material so that the state of the intraocular lens 4 moving inside the insertion tube 7 can be visually recognized from the outside.

The insertion cylinder 7 has a hollow insertion cylinder body 7a and a thin tubular nozzle portion 7b. The insertion tube 7 is attached to the distal end portion of the inserter body 5. In that case, the lens installation part 11 of the insertion device main body 5 is accommodated and arranged in the insertion tube main body 7a of the insertion tube 7 together with the intraocular lens 4 installed there. An injection hole 7c is formed on the upper surface of the insertion cylinder body 7a. The injection hole 7c is for injecting a viscoelastic substance (for example, sodium hyaluronate). The viscoelastic material injected from the injection hole 7 c is supplied to the intraocular lens 4 installed in the lens installation unit 11.

On the other hand, the rear end portion of the insertion tube main body 7a is opened, and a hook portion 7d and a wedge portion 7e are formed around the opening portion. The hooks 7d are arranged in a pair in the vertical direction, and the wedge parts 7e are arranged in a pair in the left and right. The hook portion 7 d is a portion that is hooked to the insertion tube connecting portion 5 a of the inserter body 5 when the insertion tube 7 is attached to the distal end portion of the inserter body 5. The wedge portion 7 e is a portion to be inserted into the entrance portion of the slit 12 of the inserter body 5 when the insertion tube 7 is attached to the inserter body 5.

The insertion tube body 7a is divided into a first portion 7f and a second portion 7g in the axial direction of the insertion tube 7. The first portion 7f has an internal space that can accommodate the lens installation portion 11 of the inserter body 5, and is formed wider than the second portion 7g. The second portion 7g is located in front of the first portion 7f. The internal space of the inserter body 7a is gradually narrowed from the first portion 7f to the second portion 7g in order to fold the intraocular lens 4 small when the intraocular lens 4 is pushed out by the rod 10. .

The first protrusion 7h, the second protrusion 7i, and the third protrusion 7j are formed on the second portion 7g of the insertion tube main body 7a. These three

protrusions

7h, 7i, and 7j are formed corresponding to the engaging portion 16b, which will be described later, in order to engage the attachment member 16 with the insertion tube 7, and constitute an engaged portion. . The first protrusion 7h is formed so as to protrude from one (left side) side surface of the second portion 7g. The second protrusion 7i is formed in a state adjacent to the rear of the first protrusion 7h. The second protrusion 7i protrudes from one (left side) side surface of the second protrusion 7i with a protrusion amount smaller than that of the first protrusion 7h. The third protrusion 7j is formed so as to protrude downward from the lower surface of the second portion 7g. The third protrusion 7j is formed with a position shifted rearward from the first protrusion 7h.

The nozzle portion 7b is a portion that is inserted into the incision of the eyeball when the intraocular lens 4 is inserted into the eye using the intraocular lens inserter 1. The nozzle portion 7 b is formed at the distal end portion of the insertion cylinder 7. The nozzle portion 7b is formed so as to protrude forward from the tip of the second portion 7g of the insertion tube body 7a. The nozzle portion 7 b is formed in a substantially circular shape when viewed from the axial direction of the insertion cylinder 7. The outer peripheral diameter of the nozzle portion 7b is substantially uniform over the entire length Ln of the nozzle portion 7b. The tip of the nozzle portion 7b is opened with an oblique cut from the top to the bottom, and the intraocular lens 4 is emitted to the outside through this opening. A cut portion 7k is formed at the lower opening edge of the nozzle portion 7b. The cut portion 7k is formed along the axial direction of the insertion tube 7. The cut portion 7k is preferably formed in a V shape as shown in the figure.

(Attachment)
FIG. 9 is a perspective view showing the configuration of the accessory member. FIG. 10 is a three-side view showing the configuration of the accessory member, where (A) is a plan view, (B) is a side view, and (C) is a rear view.
As an example of the additional function described above, the attachment member 16 is a function that limits the insertion amount of the nozzle portion 7b when the nozzle portion 7b is inserted into the incision of the eyeball (hereinafter also referred to as “nozzle insertion amount restriction function”). ). The nozzle insertion amount limiting function is realized by using the distal end surface 16d of the sleeve portion 16a of the attachment member 16 (details will be described later).

The attachment member 16 is a separate member from the insertion tube 7 and is configured to be detachable from the insertion tube 7. The direction and form of movement of the attachment member 16 relative to the insertion cylinder 7 are not particularly limited. For example, with respect to the direction of movement, movement of the insertion cylinder 7 in the axial direction, movement in a direction intersecting (including orthogonal) to the axial direction of the insertion cylinder 7, movement of the insertion cylinder 7 in the direction around the axis, insertion cylinder It is possible to move in the direction around the axis that intersects (including orthogonal) the axis direction of 7 and includes movements such as linear movement, rotational movement, twisting movement, opening / closing (swinging) movement, telescopic movement, etc. Conceivable. In the present embodiment, the attachment member 16 is configured to be detachable from the insertion tube 7 by the movement of the attachment member 16 with respect to the insertion tube 7. “Removable” described here means “attachment member 16 can be attached to insertion tube 7 or attachment member 16 can be detached from insertion tube 7”. In the intraocular lens insertion device 1 of the present embodiment, the attachment member 16 may be provided in a state of being attached to the insertion tube 7 or may be provided in a state of being detached from the insertion tube 7. The attachment member 16 is one of the elements constituting the intraocular lens inserter 1. Further, when the nozzle insertion amount limiting function provided by the attachment member 16 is used, the attachment member 16 is attached to the insertion tube 7, and when the function is not used, the attachment member 16 is removed from the insertion tube 7. However, even in the latter case, that is, when the attachment member 16 is not used in the intraocular lens insertion, the attachment member 16 is one of the elements constituting the intraocular lens inserter 1.

The accessory member 16 includes a sleeve portion 16a and an engaging portion 16b. The sleeve portion 16a is formed with a through hole 16c into which the nozzle portion 7b of the insertion cylinder 7 can be fitted. The through hole 16c is formed so as to penetrate the sleeve portion 16a in the axial direction. The distal end surface 16d of the sleeve portion 16a is formed in an inclined state with respect to the central axis of the sleeve portion 16a. The distal end surface 16d of the sleeve portion 16a is arranged in a state of projecting outward (in the direction in which the diameter increases) from the outer peripheral surface of the nozzle portion 7b when the attachment member 16 is attached to the insertion tube 7. For this reason, the distal end surface 16d of the sleeve portion 16a is a portion corresponding to the “projecting surface”.

However, the form of the overhanging surface is not limited to an annular flat surface that is continuous in the circumferential direction like the distal end surface 16d of the sleeve portion 16a, and may be formed in any form as long as the nozzle insertion amount limiting function is exhibited. May be. For example, the overhanging surface may be discontinuously arranged in the circumferential direction by disposing at least one place in the circumferential direction, preferably two places at a pitch of 180 degrees, or three places or more. The overhanging surface may be a curved surface. *

The engaging portion 16 b is a portion that is engaged with the insertion tube 7 when the attachment member 16 is attached to the insertion tube 7. The engagement portion 16b is configured to be able to be engaged with the insertion tube 7 and to be able to release the engagement state so that the attachment member 16 can be attached to and detached from the insertion tube 7. The engaging portion 16b has a structure in which a substantially trapezoidal conical outer wall corresponding to the outer peripheral shape of the insertion cylinder body 7a (second portion 7g) of the insertion cylinder 7 is partially cut away. The engaging part 16b is formed with a hook part 16e, a stopper part 16f, and a viewing window 16g. Among these, the hook portion 16e and the stopper portion 16f constitute a lock mechanism for positioning and temporarily fixing the attachment member 16 to the insertion tube 7. The hook portion 16 e is a portion that is hooked on the first protrusion 7 h of the insertion tube 7. A recessed portion 16h that is recessed in a semicircular shape is formed on the inner peripheral side of the hook portion 16e. The recess 16h is configured to be detachable from the second protrusion 7i of the insertion cylinder 7 from the direction around the axis of the insertion cylinder 7. “Axis rotation direction” means a direction of rotation about a central axis of a certain member. The stopper portion 16f can abut against the first projection 7h of the insertion cylinder 7 from the direction around the axis of the insertion cylinder 7, and the axial direction of the insertion cylinder 7 against the third projection 7j of the insertion cylinder 7 It is configured to be able to abut. The viewing window 16g is formed in a state where the upper portion of the engaging portion 16b is cut out in a substantially V shape in plan view. The viewing window 16g is formed so that the state of the intraocular lens 4 moving inside the insertion cylinder 7 can be visually recognized from the outside even when the attachment member 16 is attached to the insertion cylinder 7. The material of the attachment member 16 is not particularly limited, for example, metal, ceramic, resin, etc., but a transparent or translucent material is preferable so that an intraocular lens moving inside the insertion tube 7 can be visually recognized from the outside. . Further, the protruding surface of the attachment member 16 is in direct contact with the cornea when the intraocular lens is inserted into the eye, thereby applying a load to the cornea. It is preferably formed of a resin.

11A and 11B show a state in which the attachment member is attached to the insertion tube. FIG. 11A is a plan view, FIG. 11B is a side view, and FIG.
In the state where the attachment member 16 is attached to the insertion cylinder 7 as shown, the nozzle portion 7b is fitted into the through hole 16c of the sleeve portion 16a. At this time, the distal end surface 16d of the sleeve portion 16a is disposed so as to protrude outward from the outer peripheral surface of the nozzle portion 7b, and is inclined in the same direction as the cut end of the nozzle portion 7b with respect to the axial direction of the insertion cylinder 7. Arranged in a state.

In that case, the inner diameter of the through hole 16c of the sleeve portion 16a is the same as or larger than the outer diameter of the nozzle portion 7b over the entire axial length of the sleeve portion 16a so as not to deform the shape of the nozzle portion 7b fitted therein. May be set slightly larger. As another preferred embodiment, as shown in FIGS. 12A and 12B, a tapered portion 16i may be formed in a part of the through hole 16c of the sleeve portion 16a. The tapered portion 16i is formed so that the diameter of the through hole 16c gradually decreases toward the distal end of the sleeve portion 16a on the distal end side of the sleeve portion 16a. The minimum diameter of the through hole 16c in the taper portion 16i is set smaller than the outer diameter of the nozzle portion 7b. Thereby, in the state which attached member 16 to insertion cylinder 7, taper part 16i contacts the part in which outer peripheral surface of nozzle part 7b and cut part 7k were formed. For this reason, on the distal end side of the sleeve portion 16a, the outer diameter of the sleeve portion 16a is reduced by contact with the tapered portion 16i.

On the other hand, the hook portion 16e of the engaging portion 16b is hooked on the first protrusion 7h. At this time, the recessed portion 16h is fitted to the second protrusion 7i (see FIG. 12A). Further, the stopper portion 16f of the engaging portion 16b is in a state of being in proximity to or in contact with the third protrusion 7j of the insertion tube 7. At that time, the attachment member 16 is positioned with respect to the insertion tube 7 as follows. That is, in the direction around the axis of the insertion cylinder 7, the recess 16 h is fitted into the second protrusion 7 i of the insertion cylinder 7 and the hook 16 e is hooked on the first protrusion 7 h of the insertion cylinder 7. The position of the attachment member 16 is determined. Further, in the axial direction of the insertion cylinder 7, the position of the attachment member 16 is determined by the stopper portion 16f abutting against the third projection 7j.

Here, when removing the attachment member 16 from the insertion tube 7, the attachment member 16 is rotated in the direction around the axis of the insertion tube 7, and then the attachment member 16 is moved in the axial direction of the insertion tube 7. The attached state of the attachment member 16 to the cylinder 7 is released. Specifically, first, as shown in FIG. 13 (A), by rotating the attachment member 16 in the direction of the arrow, as shown in FIG. 13 (B), the stopper portion 16f of the engaging portion 16b is inserted into the insertion tube body. The first projection 7h of 7a is brought into contact with or close to the first projection 7h. As a result, the hook portion 16e of the engaging portion 16b is disengaged from the first protrusion 7h of the insertion tube 7, and the recess 16h (see FIGS. 10 and 12) inside the hook portion 16e is detached from the second protrusion 7i. . Next, as shown in FIG. 13C, the attachment member 16 is pulled out in the arrow direction along the axial direction of the insertion tube 7. Thereby, the attachment member 16 can be removed from the insertion cylinder 7.

On the other hand, when attaching the attachment member 16 to the insertion tube 7, the procedure reverse to the above, that is, after moving the attachment member 16 in the axial direction of the insertion tube 7, the attachment member 16 is moved around the axis of the insertion tube 7. By rotating, the attachment member 16 is engaged with the insertion tube 7. Specifically, in FIG. 13C, the attachment member 16 is fitted into the insertion tube 7 in the direction opposite to the arrow, thereby inserting the stopper portion 16f of the engaging portion 16b as shown in FIG. 13B. The third projection 7j of the cylinder 7 is brought into contact with or close to the third projection 7j. Next, by rotating the attachment member 16 in the direction opposite to that during removal, the hook portion 16e of the engaging portion 16b is hooked on the first protrusion 7h of the insertion tube 7, and the recess portion 16h is hooked on the second protrusion 7i. Fit. Thereby, the attachment member 16 can be attached to the insertion cylinder 7. Thus, in the state where the attachment member 16 is attached to the insertion tube 7, the movement of the attachment member 16 in the axial direction of the insertion tube 7 is caused by the engagement (contact) between the first protrusion 7h and the hook portion 16e, and the first 3 is restricted by the engagement (contact) of the projection 7j of the third portion and the stopper 16f. For this reason, the attachment member 16 cannot be moved in the axial direction of the insertion tube 7. In other words, the position of the attachment member 16 is fixed in the axial direction of the insertion tube 7. Further, the engagement state of the engagement portion 16b of the attachment member 16 and the engagement portion (7h, 7i, 7j) of the insertion tube 7 cannot move the attachment member 16 in the axial direction of the insertion tube 7 as described above. Therefore, the attachment member 16 attached to the insertion tube 7 is not released unless it is rotated in the direction around the axis of the insertion tube 7.

(Rotating member)
As shown in FIG. 14, the rotary member 8 is attached to the rear end portion of the inserter body 5. In this attached state, the rotating member 8 is arranged coaxially with the inserter body 5 and is supported rotatably around the axis of the inserter body 5. The rotating member 8 is formed in a cylindrical shape. The front end and the rear end of the rotating member 8 are each opened in a circular shape. As shown in FIGS. 1 and 2, a plurality of protrusions 8 a are formed on the outer peripheral surface of the rotating member 8. Each protruding portion 8 a is formed in parallel with the axial direction of the rotating member 8. The rotating member 8 is a portion that is rotated by the user when the intraocular lens inserter 1 is used in a screw manner. At this time, if a plurality of ridges 8a are formed on the outer peripheral surface of the rotating member 8, the user's finger is hooked on the ridges 8a, so that the rotating member 8 can be easily rotated.

A first threaded portion 8 b is formed on the inner peripheral surface of the rotating member 8. The first screw portions 8b are formed at a predetermined pitch. In addition, two window portions 8 c are formed at the distal end portion of the rotating member 8. The two window portions 8c are formed at an interval of 180 degrees in the circumferential direction. These window portions 8c are for visually confirming whether or not the inserter body 5 and the rotating member 8 are correctly connected. A pair of hooking claws 8 d are formed on the inner peripheral portion of the tip of the rotating member 8. The pair of hook claws 8 d are hooked to the rotation support portion 15 of the inserter body 5 when the rotary member 8 is connected to the rear end portion of the inserter body 5. Each hooking claw 8d is formed in the vicinity of the opening on the distal end side of the rotating member 8 adjacent to the window portion 8c. The rotating member 8 is supported so as to be rotatable in the direction around the axis of the inserter body 5 with the pair of hooking claws 8d hooked on the rotation support portion 15. The pair of hooking claws 8 d are fitted between the flange portion 14 and the rotation support portion 15 of the inserter body 5. For this reason, the rotating member 8 is rotatable in the direction around the axis of the inserter body 5, but does not move in the axial direction of the inserter body 5.

(Plunger)
The plunger 9 is disposed coaxially with the inserter body 5. The plunger 9 is provided so as to be movable in the axial direction of the inserter body 5. The plunger 9 has a rod-shaped plunger shaft 9a. The distal end portion of the plunger 9 is a sealing material attaching portion 9b as shown in FIG. FIG. 15 is a sectional view taken along line E2-E2 in FIG. The seal material attachment portion 9b is composed of two disk portions having an outer diameter slightly smaller than the inner diameter of the inserter body 5, and the seal material 17 is attached between these two disk portions. As the sealing material 17, for example, an O-ring can be used. When the plunger 9 is moved in the axial direction (forward) of the inserter body 5, the seal material 17 comes into contact with the inner peripheral surface of the inserter body 5 and generates an appropriate sliding resistance.

The vertical cross-sectional shape of the plunger shaft 9a is substantially cross-shaped as shown in FIGS. 16 (A) and 16 (B). 16A is a cross-sectional view taken along line E3-E3 in FIG. 2, and FIG. 16B is a cross-sectional view taken along line E4-E4 in FIG. As shown in FIGS. 1 and 2, second screw portions 9 c are respectively formed on the upper surface and the lower surface of the plunger shaft 9 a. The second screw portion 9 c is formed corresponding to the first screw portion 8 b of the rotating member 8. For this reason, the 2nd screw part 9c is formed with the same pitch as the 1st screw part 8b. The second screw portion 9c is held in a state of always meshing with the first screw portion 8b of the rotating member 8. For this reason, when the rotary member 8 is rotated, the plunger 9 moves in the axial direction of the inserter body 5 according to the rotation direction and the rotation amount. The plunger 9 is a portion that is pushed by the user when the intraocular lens inserter 1 is used in a push manner. Here, the second screw portion 9c of the plunger 9 and the first screw portion 8b of the rotating member 8 corresponding to the second screw portion 9c are engaged with each other in the relationship between the screw groove and the thread, and the first screw portion at the meshing portion. As shown in FIG. 14, the 8b and the second screw portion 9c are inclined at a predetermined taper angle with respect to the Z-axis (the vertical direction in the figure). If the taper angles of these

screw portions

8b and 9c are adjusted (set) to an appropriate angle, the rotating member 8 can be rotated with almost no resistance when the plunger 9 is pushed in. In particular, when the taper angle θ behind the second screw portion 9c that contacts the first screw portion 8b of the rotating member 8 when the plunger 9 is pushed is 5 to 15 °, the plunger is pushed by the pushing operation. When 9 moves forward, the rotating member 8 idles without the

screw portions

8b and 9c being caught, which is preferable. Further, in order to efficiently apply the load necessary for moving the plunger 9 forward by the pushing operation to the rotating member 8, the groove width (dimension in the Y-axis direction) of the screw portion 9c in the plunger 9 is set to 1.0 mm or more. It is desirable to set it to 4.0 mm or less. The screw pitch is desirably adjusted according to the set intraocular lens discharge load.

The distal end side of the plunger 9 is disposed by being inserted into the inserter body 5 including the sealing material attaching portion 9b, and the rear end side of the plunger 9 is disposed in a state of protruding rearward from the rotating member 8. The In an initial state before use, the protrusion dimension Lp (see FIG. 2B) of the plunger 9 with respect to the rear end position of the rotating member 8 is necessary for pushing out the intraocular lens 4 from the distal end of the insertion tube 7. The moving dimension of the rod 10 is set. Here, the initial state before use refers to a state before an operation for pushing out the intraocular lens 4 with the rod 10 when the intraocular lens inserter 1 is used. The intraocular lens insertion device 1 of the present embodiment can move the rod 10 forward by either of the rotation operation of the rotation member 8 and the pushing operation of the plunger 9. For this reason, the initial state before use is a state in which neither the rotation operation of the rotating member 8 nor the pushing operation of the plunger 9 is performed.

In the initial state before use, the plunger 9 is arranged in a state of being largely pulled out so that the protruding dimension Lp of the plunger shaft 9a is almost the maximum or close to it. In this state, the seal member mounting portion 9 b of the plunger 9 is disposed in a state of being in proximity to or in contact with the rotation restricting portion 13 of the inserter body 5. At this time, the sealing material attaching portion 9 b of the plunger 9 faces the retaining portion 13 d of the rotation restricting portion 13. For this reason, if it is going to move the plunger 9 back from the initial state before use, the sealing material attachment part 9b will contact | abut the retaining part 13d. Thereby, the plunger 9 is prevented from coming off from the inserter body 5.

Further, when the distal end side of the plunger 9 is inserted into the inserter body 5 together with the rod 10, the rotation restricting portion 13 is opened as shown in FIG. Thereby, it is possible to avoid the interference with the rotation restricting portion 13 and insert the distal end side of the plunger 9 into the inserter body 5 with the seal material 17. Further, when the rotation restricting portion 13 is closed so as to be fitted to the plunger shaft 9a of the plunger 9 from that state, as shown in FIGS. 16A and 16B, a part of the plunger shaft 9a (second screw) The portion where the portion 9c is formed fits into the guide groove 13c of the sliding guide 13b. At this time, the two opposing surfaces of the guide groove 13c are arranged so as to support a part of the plunger shaft 9a from both sides as shown in FIG. Thereby, the plunger 9 is supported movably in the axial direction of the inserter body 5. However, the rotation of the plunger 9 with respect to the direction around the axis of the inserter body 5 is restricted by the rotation restricting portion 13.

(rod)
The rod 10 pushes the intraocular lens 4 installed in the lens installation unit 11 forward, thereby releasing the intraocular lens 4 from the distal end portion of the insertion tube 7 (opening of the nozzle portion 7b). The rod 10 is formed in an elongated rod shape. The rod 10 is connected to the tip of the plunger 9 and moves in the axial direction of the hollow body integrally with the plunger 9.

<How to use the intraocular lens inserter>
Next, a method of using the intraocular lens inserter 1 will be described.

First, the user injects a viscoelastic material into the injection hole 7c of the insertion cylinder 7. Thereby, a viscoelastic substance is supplied to the intraocular lens 4 installed in the lens installation unit 11 of the inserter body 5.

Next, the user moves the slider 6 forward. Thereby, a lens contact portion (not shown) formed at the tip of the slider 6 contacts the intraocular lens 4 and pushes out the intraocular lens 4 as it is. Then, the intraocular lens 4 is deformed into a predetermined shape. When the intraocular lens 4 is deformed by the movement of the slider 6 as described above, the intraocular lens 4 is easily folded into a desired shape when the intraocular lens 4 is pushed out by the rod 10 in the subsequent operation.

Next, the user moves the rod 10 forward together with the plunger 9 by operating the intraocular lens inserter 1 by a push method or a screw method, and the intraocular lens 4 from the nozzle portion 7 b of the insertion tube 7. Release. At this time, the rod 10 contacts the intraocular lens 4 while moving forward, and pushes out the intraocular lens 4 as it is. Then, the intraocular lens 4 moves in the insertion tube 7 while being folded into a predetermined shape, and is released from the opening at the tip of the nozzle portion 7b. Therefore, by releasing the intraocular lens 4 in a state where the nozzle portion 7b of the insertion tube 7 is inserted into the incision of the eyeball, the intraocular lens 4 can be inserted into the eye in a small folded state. Further, after the intraocular insertion, the intraocular lens 4 can be restored to the original shape by the restoring force of the intraocular lens 4 itself.

<Effects of First Embodiment>
Next, effects produced by the intraocular lens inserter 1 according to the first embodiment of the present invention will be described.

The intraocular lens inserter 1 of the present embodiment can support two different operation methods, that is, both a screw method and a push method. The screw method is a method in which the intraocular lens 4 is pushed out by rotating the rotating member 8, and the push method is a method in which the intraocular lens 4 is pushed out by pushing in the plunger 9. Therefore, when using the intraocular lens insertion device 1, a user who prefers the screw method can push out the intraocular lens 4 by rotating the rotating member 8, and a user who prefers the push method can use the plunger 9. The intraocular lens 4 can be pushed out by a pushing operation. Hereinafter, each operation method will be described.

(Screw method)
When the intraocular lens inserter 1 is used in a screw manner, the user rotates the rotating member 8. Specifically, while supporting the inserter body 5 with one hand, the rotating member 8 is rotated with the other hand. At this time, including the initial state before use, the first screw portion 8b of the rotating member 8 and the second screw portion 9c of the plunger 9 are always held in mesh. For this reason, when the rotating member 8 is rotated in a predetermined direction (clockwise as viewed from the rear end side of the intraocular lens inserter 1), the plunger 9 moves forward according to the rotation of the rotating member 8, and together with it. The rod 10 also moves forward. Further, since the rotation of the plunger 9 in the direction around the axis of the inserter body 5 is regulated by the rotation restricting portion 13, the plunger 9 and the rod 10 move forward without rotating around the axis of the inserter body 5. To do. Thereby, the intraocular lens 4 installed in the lens installation part 11 of the inserter body 5 is pushed out from the tip of the nozzle part 7 b by the movement of the rod 10.

(Push method)
When the intraocular lens inserter 1 is used in a push manner, the user pushes the plunger 9 for operation. Specifically, the thumb is pressed against the rear end portion of the plunger 9 with the index finger and the middle finger hooked on the flange portion 14 of the inserter body 5. In this state, the plunger 9 is pushed forward. Then, the pushing force applied to the plunger 9 is converted into a force for rotating the rotating member 8 by the meshing of the first screw portion 8b and the second screw portion 9c. For this reason, when the plunger 9 is pushed forward, the plunger 9 moves forward together with the rod 10, and the rotating member 8 rotates according to the movement of the plunger 9. Further, since the rotation of the plunger 9 in the direction around the axis of the inserter body 5 is regulated by the rotation restricting portion 13, the plunger 9 and the rod 10 move forward without rotating around the axis of the inserter body 5. To do. Thereby, the intraocular lens 4 installed in the lens installation part 11 of the inserter body 5 is pushed out from the tip of the nozzle part 7 b by the movement of the rod 10.

As described above, the intraocular lens inserter 1 according to the present embodiment is compatible with both the screw type and push type operation methods. Therefore, the user of the intraocular lens insertion device 1 can select one of the operation methods according to his / her preference or according to other reasons, circumstances, and the like. Thereby, it becomes possible to flexibly cope with the difference in the technique of the intraocular lens insertion technique with one intraocular lens insertion device 1. Moreover, it becomes possible to cope with both the user who likes the screw method and the user who likes the push method. Further, since the first screw portion 8b of the rotating member 8 and the second screw portion 9c of the plunger 9 are always engaged with each other including the initial state before use, the screw method is used. Can push the intraocular lens 4 only by rotating the rotating member 8. Further, in the case of operating by the push method, since the first screw portion 8b and the second screw portion 9c are held in mesh from the start to the end of the operation, vibration or the like occurs during the pushing operation of the plunger 9. Less likely to occur.

(Attachment member nozzle insertion amount restriction function)
The intraocular lens inserter 1 of the present embodiment can use the nozzle insertion amount limiting function provided by the attachment member 16 or can avoid the use thereof. Specifically, the attachment member 16 is configured to be movable with respect to the insertion tube 7, and thereby the attachment member 16 can be attached to and detached from the insertion tube 7. For this reason, the nozzle insertion amount restriction function can be used in a state where the attachment member 16 is attached to the insertion cylinder 7, and the use of the nozzle insertion amount restriction function is avoided when the attachment member 16 is removed from the insertion cylinder 7. be able to. Hereinafter, the case where the nozzle insertion amount restriction function is used and the case where it is not used will be described separately.

(When using the nozzle insertion amount restriction function)
When the nozzle insertion amount limiting function provided by the attachment member 16 is used, the attachment member 16 is attached to the insertion tube 7. As a result, the nozzle portion 7b of the insertion cylinder 7 is partially covered by the sleeve portion 16a of the attachment member 16. In the cataract operation, the nozzle insertion amount limiting function is performed when an incision 50a is formed around the cornea 50 of the eyeball and the nozzle portion 7b of the insertion tube 7 is inserted into the incision 50a as shown in FIG. This is exhibited when the distal end surface 16d of the sleeve portion 16a contacts the outer surface 50b of the cornea 50. At that time, the distal end surface 16d of the sleeve portion 16a functions as a stopper that suppresses further insertion of the nozzle portion 7b by contacting the outer surface 50b of the cornea 50, and the amount of insertion of the nozzle portion 7b by this stopper function. Is limited.

Here, when the Wound-assisted method is applied, the insertion amount (maximum value) L1 of the nozzle portion 7b with respect to the tip surface 16d of the sleeve portion 16a is set to 1.0 mm or more and 1.2 mm or less. It is desirable to set the relative position between the cylinder 7 and the attachment member 16. Thereby, the insertion amount of the nozzle part 7b with respect to the incision 50a of the cornea 50 can be restrict | limited to the said protrusion amount L1. Accordingly, the intraocular lens 4 can be released from the tip of the nozzle portion 7b with the nozzle portion 7b being inserted shallowly into the incision 50a of the cornea 50. Further, in a state where the attachment member 16 is attached to the insertion tube 7 in order to use the nozzle insertion amount restriction function, the movement of the attachment member 16 with respect to the axial direction of the insertion tube 7 is caused by the relationship between the first protrusion 7h and the hook portion 16e. And the engagement between the third protrusion 7j and the stopper portion 16f. For this reason, after the intraocular lens 4 is released from the tip of the nozzle portion 7b, the nozzle portion 7b is pulled out from the incision 50a of the cornea 50, and at the same time, the tip surface 16d of the attachment member 16 is removed from the outer surface 50b of the cornea 50. Can be separated. Further, when the nozzle insertion amount limiting function is used, the insertion cylinder 7 and the attachment member 16 are used in a combined state as described above. For this reason, the engaging portion 16b of the attachment member 16 and the engaging portions (7h, 7i, 7j) of the insertion tube 7 are always maintained in the engaged state, and the engaged state is not released.

(When not using the nozzle insertion amount restriction function)
On the other hand, when the nozzle insertion amount restriction function provided by the attachment member 16 is not used, the attachment member 16 is removed from the insertion tube 7. Thereby, the nozzle part 7b of the insertion cylinder 7 is not covered with the sleeve part 16a of the attachment member 16, and the entire nozzle part 7b is exposed to the outside. For this reason, when the nozzle portion 7b of the insertion tube 7 is inserted into the incision 50a of the cornea 50, the nozzle portion 7b can be inserted deeper than when the above-described nozzle insertion amount limiting function is used. Accordingly, the intraocular lens 4 can be released from the tip of the nozzle portion 7b with the nozzle portion 7b inserted deeply into the incision 50a of the cornea 50.

As described above, the intraocular lens inserter 1 of the present embodiment can not only use the nozzle insertion amount limiting function by attaching the attachment member 16 to the insertion tube 7, but also remove the attachment member 16 from the insertion tube 7 to insert the nozzle. Use of the restriction function can be avoided. Therefore, the user of the intraocular lens insertion device 1 uses the nozzle insertion amount restriction function or avoids the use thereof according to his / her preference or other reasons and circumstances. Can do. Thereby, even if there are a user who likes the technique of inserting the nozzle part 7b deeply into the incision 50a of the eyeball and a user who likes the technique of inserting the shallow part, it is possible to flexibly respond to the preference of each user's technique. Is possible.

In addition, if a plurality of attachment members 16 having different sizes (particularly lengths) of the sleeve portion 16a are prepared, any size attachment member 16 is attached to the insertion tube 7 when the nozzle insertion amount restriction function is used. As a result, it is possible to change (increase / decrease) the protruding amount of the nozzle portion 7b based on the tip surface 16d of the sleeve portion 16a. For example, if it is desired to change the protrusion amount to be larger than the protrusion amount L1 of the nozzle portion 7b shown in FIG. 17 (for example, 5.0 mm or more and 6.5 mm or less), as shown in FIG. By attaching the member 16 to the insertion cylinder 7, the protrusion amount (maximum value) L2 of the nozzle portion 7b can be secured larger than the protrusion amount L1. Thereby, the insertion amount when inserting the nozzle part 7b in the incision 50a of the cornea 50 can be changed.

The intraocular lens inserter 1 of the present embodiment has an effect (hereinafter referred to as “first effect”) that allows the operation method of the intraocular lens inserter 1 to be selected from a screw method and a push method, and a nozzle. This provides an effect (hereinafter referred to as “second effect”) that enables selection of whether or not to use the insertion amount restriction function. However, the first effect and the second effect are obtained by different configurations. That is, the first effect is obtained by the configuration (hereinafter referred to as “first configuration”) including the above-described inserter body 5, the rotating member 8, the plunger 9, and the rod 10. This effect is obtained by the configuration including the insertion cylinder 7 and the attachment member 16 described above (hereinafter referred to as “second configuration”). Therefore, the first effect can be obtained even without the second configuration, and the second effect can be obtained even without the first configuration.

In the present embodiment, the outer diameter of the nozzle portion 7b can be reduced by forming the tapered portion 16i in the through hole 16c of the attachment member 16 and bringing the tapered portion 16i into contact with the outer peripheral surface of the nozzle portion 7b. The configuration is adopted. Thereby, even if the size of the incision formed in the eyeball is reduced, the tip of the nozzle portion 7b can be easily inserted into the incision. In addition, when the intraocular lens 4 is passed through the nozzle portion 7b in a state of being folded into a predetermined shape, the nozzle portion 7b is pushed by the intraocular lens 4 from the inside and deformed. At this time, if the cut portion 7k is formed in the nozzle portion 7b, even if the nozzle portion 7b is pushed by the intraocular lens 4 and deformed, damage such as cracks is less likely to enter the nozzle portion 7b. Further, the amount of deformation of the nozzle portion 7 b can be suppressed to the minimum necessary for the release of the intraocular lens 4. For this reason, the intraocular lens 4 can be inserted from a smaller incision.

In the present embodiment, a configuration in which a viewing window 16g is formed on the attachment member 16 is adopted. For this reason, even when the intraocular lens inserter 1 is used with the attachment member 16 attached to the insertion tube 7, the state of the intraocular lens 4 moving inside the insertion tube 7 is visually recognized from the outside through the viewing window 16g. can do. Accordingly, the user of the intraocular lens inserter 1 operates the intraocular lens inserter 1 while visually confirming the state of the intraocular lens 4 pushed out by the rod 10 even when the attachment member 16 is attached. Can do.

Second Embodiment
Next, a second embodiment of the present invention will be described.
FIG. 19 is a perspective view showing a state in which an attachment member is attached to the insertion tube in the intraocular lens insertion device according to the second embodiment of the present invention. Hereinafter, the configuration of the insertion tube and the accessory member according to the second embodiment of the present invention will be described in detail.

(Insertion tube)
FIG. 20 is a perspective view showing a configuration of an insertion cylinder according to the second embodiment of the present invention.
The insertion tube 7 differs from the first embodiment only in the configuration of the engaged portion. That is, in the first embodiment, the engaged portion is configured by the three

protrusions

7h, 7i, and 7j. In the second embodiment, the engaged portion is configured by one locking claw 7m. Yes. The locking claw 7m is formed in a substantially U shape in front view from both side surfaces to the lower surface of the second portion 7g of the insertion tube main body 7a. The locking claw 7m is formed in a state of protruding downward from the lower surface of the second portion 7g.

(Attachment)
FIG. 21 is a perspective view showing a configuration of an attachment member according to the second embodiment of the present invention. Moreover, FIG. 22 shows the structure of the attachment member based on 2nd Embodiment of this invention, (A) is a top view, (B) is a side view, (C) is a bottom view, (D) is a rear view. It is.
The attachment member 16 includes the sleeve portion 16a and the engaging portion 16b as in the first embodiment, but the configuration of the engaging portion 16b is different. That is, in the engaging portion 16b, a tongue piece 16j is integrally formed in addition to the viewing window 16g, and the hook portion 16e and the stopper portion 16f are not formed. The tongue piece 16j is formed so as to extend in the axial direction of the attachment member 16 from the lower portion of the engaging portion 16b. The tongue piece 16j is formed in a ladder shape having three engagement holes 16k. In the following description, the three engagement holes 16k are distinguished by identification codes such as 16k-1, 16k-2, and 16k-3, respectively. The three engagement holes 16k-1, 16k-2, 16k-3 are formed side by side so as to be adjacent to each other at a predetermined interval in the axial direction of the attachment member 16. Further, the three engagement holes 16k-1, 16k-2, and 16k-3 are sequentially arranged from the front to the rear in the axial direction of the attachment member 16. The attachment member 16 is configured to be engaged with the insertion cylinder 7 by engaging the locking claw 7m of the insertion cylinder 7 with any of the three engagement holes 16k-1, 16k-2, 16k-3. It has become.

FIG. 23 shows a state in which the attachment member is attached to the insertion tube, where (A) is a plan view, (B) is a side view, and (C) is a bottom view. 24A is a cross-sectional view along line J2-J2 in FIG. 23, FIG. 24B is a cross-sectional view along line J1-J1 in FIG. 23, and FIG. 24C is an enlarged view of a portion K in FIG.
In the state where the attachment member 16 is attached to the insertion cylinder 7 as shown, the nozzle portion 7b is fitted into the through hole 16c of the sleeve portion 16a. Further, the locking claw 7m formed on the insertion cylinder 7 has a central engagement hole among the three engagement holes 16k-1, 16k-2, 16k-3 formed on the tongue 16j of the attachment member 16. 16k-2 is engaged. At this time, the distal end surface 16d of the sleeve portion 16a is disposed so as to protrude outward from the outer peripheral surface of the nozzle portion 7b, and is inclined in the same direction as the cut end of the nozzle portion 7b with respect to the axial direction of the insertion cylinder 7. Arranged in a state.

When using the nozzle insertion amount limiting function, the locking claw 7m is engaged with any one of the three engagement holes 16k-1, 16k-2, 16k-3. In this case, the protruding amount of the nozzle portion 7b with respect to the tip surface 16d of the sleeve portion 16a varies depending on which engagement hole 16k is engaged with the locking claw 7m. FIG. 25A is a side view showing a state in which the locking hole 7m is engaged with the rear engagement hole 16k-3. In this state, the attachment member 16 is disposed relatively forward in the axial direction of the insertion tube 7. For this reason, the protrusion amount of the nozzle part 7b becomes relatively small. On the other hand, FIG. 25B is a side view showing a state in which the locking hole 7m is engaged with the central engaging hole 16k-2. In this state, the protruding amount of the nozzle portion 7b is larger than that in the state of FIG. FIG. 25C is a side view showing a state in which the locking hole 7m is engaged with the front engaging hole 16k-1. In this state, the attachment member 16 is disposed relatively rearward in the axial direction of the insertion tube 7. For this reason, the protrusion amount of the nozzle part 7b becomes large compared with the state of FIG.25 (B).

Thus, in the second embodiment of the present invention, the attachment member 16 is appropriately moved in the axial direction of the insertion tube 7 to engage the locking piece 7m with any of the engagement holes 16k of the tongue piece 16j. The protruding amount of the nozzle portion 7b can be changed (adjusted) in three stages of large, medium and small. Further, if more engaging holes 16k are formed in the tongue piece 16j of the attachment member 16, the protruding amount of the nozzle portion 7b can be changed in more stages. Further, when the attachment member 16 is pressed in the axial direction of the insertion cylinder 7 in a state where the locking piece 7m of the insertion cylinder 7 is engaged with the central engagement hole 16k-2, the attachment member is received by the pressing force. The 16 tongue pieces 16j are elastically deformed (bend deformation), whereby the locking piece 7m is engaged with the adjacent engagement hole 16k-1 or 16k-3. For this reason, the protrusion amount of the nozzle portion 7b can be changed while the attachment member 16 is attached to the insertion tube 7. Thereby, even if the attachment member 16 is not attached to or detached from the insertion tube 7, the protruding amount of the nozzle portion 7 b can be changed. For this reason, the effort which removes the attachment member 16 from the insertion cylinder 7, and the effort which puts the removed attachment member 16 on a tray etc. can be saved. Further, there is no possibility that the attachment member 16 removed from the insertion tube 7 will be dropped or lost by carelessness of the user.

When the nozzle insertion amount limiting function is not used, for example, the entire nozzle portion 7b is exposed by releasing the engagement state between the locking piece 7m and the tongue piece 16j and removing the attachment member 16 from the insertion tube 7. Can be made. Alternatively, when the attachment member 16 is moved backward by a predetermined amount while the attachment member 16 is attached to the insertion cylinder 7, the entire nozzle portion 7b is exposed, and in this state, the locking piece 7m and the engagement hole The attachment member 16 may be engaged with the insertion tube 7 by engagement with 16k. When this configuration is adopted, it is possible to switch whether to use the nozzle insertion amount limiting function without removing the attachment member 16 from the insertion cylinder 7. For this reason, the attachment member 16 does not need to be detachable from the insertion tube 7.

<Third Embodiment>
FIG. 26 is a perspective view showing a configuration of an intraocular lens inserter according to the third embodiment of the present invention. FIG. 27A is a plan view showing the configuration of an intraocular lens inserter according to a third embodiment of the present embodiment, FIG. 27B is a side view, and FIG. 27C is a cross-sectional view taken along line MM in FIG. It is.
Compared with the first embodiment, the intraocular lens inserter 1 according to the third embodiment of the present invention has a position and structure of the rotation restricting portion 13, a partial structure of the plunger 9, and a structure of the insertion cylinder 7. The structure of the attachment member 16 is different.

(Position and structure of rotation restricting part)
FIG. 28 is a perspective view showing a configuration of an inserter body according to a third embodiment of the present invention, in which (A) shows a state in which a rotation restricting portion provided in the inserter body is opened, and (B) shows a rotation restricting portion. The closed state is shown.

The rotation restricting portion 13 is formed at the rear end portion of the inserter body 5 that is located slightly behind the flange portion 14 in the axial direction of the inserter body 5. When the rotation member 8 is attached to the rear end portion of the inserter body 5, the rotation restricting portion 13 is disposed inside the rotation member 8 (see FIG. 27C). For this reason, the entire rotation restricting portion 13 is shielded by the rotating member 8. The function, structure, and the like of the rotation restricting unit 13 are basically the same as those in the first embodiment.

As described above, the rotation restricting portion 13 is formed at the rear end portion of the inserter body 5, and the rotation restricting portion 13 is shielded by the rotating member 8 attached thereto, thereby comparing with the first embodiment. Thus, the length of the inserter body 5 can be shortened, and the size of the intraocular lens inserter 1 can be reduced. Further, after the intraocular lens inserter 1 is assembled, the rotation restricting portion 13 is hidden inside the rotating member 8, so that the rotation restricting portion 13 cannot be opened. For this reason, the risk that an operator etc. decompose | disassemble the intraocular lens insertion device 1 can be reduced. Further, since it is not necessary to form the rotation restricting portion 13 in front of the flange portion 14, the reinforcing rib 18 can be formed on the outer peripheral surface of the inserter body 5 to reinforce the flange portion 14. Thereby, even when strong force is added to the flange part 14 by operation of a push system, a deformation | transformation of the flange part 14 can be suppressed.

In the third embodiment, the entire rotation restricting portion 13 is shielded by the rotating member 8. However, the present invention is not limited to this, and at least a part of the rotation restricting portion 13 is shielded by the rotating member 8. If it becomes the structure which becomes, it can reduce the risk that an operator etc. will decompose | disassemble the intraocular lens insertion device 1. FIG. The position of the rotation restricting portion 13 employed in the third embodiment can also be employed in the first embodiment and the second embodiment.

Further, in the third embodiment, a hook mechanism is employed in order to keep the rotation restricting portion 13 in the closed state. For example, as shown in FIG. 39A, the hook mechanism includes a first hook claw 13 e formed on the rotation restricting portion 13 and a second hook claw 19 formed on the outer peripheral surface of the inserter body 5. FIGS. 39A to 39D show the case where the rotation restricting portion 13 is viewed from the rear of the inserter body 5.

1st hook nail | claw 13e is formed in the rotation control part 13 on the opposite side to the pivot part 13a. The pivot portion 13a connects the rotation restricting portion 13 and the inserter body 5 and supports the rotation restricting portion 13 so as to be rotatable (openable and closable). The 2nd hook nail | claw 19 is formed in the opposite side of the pivot part 13a in the left-right direction.

In the hook mechanism configured as described above, when the rotation restricting portion 13 is closed from the opened state, the first hook claw 13e of the rotation restricting portion 13 is hooked and locked to the second hook claw 19 of the inserter body 5. The At this time, in the radial direction of the inserter body 5, the first hook claw 13e is disposed relatively outside, and the second hook claw 19 is disposed relatively inside. The plunger 9 is fitted into a guide groove 13 c formed between the pair of sliding guides 13 b of the rotation restricting portion 13. For this reason, when the rotary member 8 is rotated to use the intraocular lens inserter 1 in a screw manner, the rotation restricting portion 13 restricts the rotation of the plunger 9 in the direction around the axis of the inserter body 5.

Further, since the first screw portion 8b of the rotating member 8 and the second screw portion 9c of the plunger 9 are meshed with each other, when the rotating member 8 is rotated to move the plunger 9 forward, the rotating member 8 rotates. Thus, a rotational force Fr is applied to the plunger 9. When the rotational force Fr is applied to the plunger 9, the rotation restricting portion 13 is pushed by the plunger 9. As a result, the first hook claw 13 e of the rotation restricting portion 13 is pressed against the second hook claw 19. Therefore, the first hook claw 13e and the second hook claw 19 can be held in the locked state. Therefore, there is no possibility that the first hook claw 13e and the second hook claw 19 come off during the rotation operation of the rotating member 8.

On the other hand, for example, as shown in FIG. 39 (B), the positional relationship between the pivotal support portion 13a of the rotation restricting portion 13 and the first hook claw 13e is reversed left and right, and the second hook is attached to the inserter body 5 accordingly. When the claw 19 is formed, the first hook claw 13e and the second hook claw 19 may come off during the rotation operation of the rotary member 8. Specifically, when a rotational force Fr is applied to the plunger 9 by the rotation operation of the rotating member 8, the rotational force Fr is pushed depending on the characteristics of the material constituting the inserter body 5 (including the rotation restricting portion 13). Thus, the rotation restricting portion 13 may be deformed or displaced. As a result, the first hook claw 13e may be displaced outward and come off from the second hook claw 19. For this reason, as shown in FIG. 39A, the rotational force Fr applied to the plunger 9 by the rotation operation of the rotating member 8 should be applied in the direction in which the first hook claw 13e is pressed against the second hook claw 19. preferable.

Further, as shown in FIG. 39C, the first hook claw 13e of the rotation restricting portion 13 is arranged relatively inside, and the second hook claw 19 of the inserter body 5 is arranged relatively outside. It is also possible to adopt a configuration. Also in this configuration, the rotational force Fr applied to the plunger 9 by the rotating operation of the rotating member 8 is applied in the direction in which the first hook claw 13e is pressed against the second hook claw 19. For this reason, there is no possibility that the first hook claw 13e and the second hook claw 19 come off during the rotation operation of the rotating member 8. Incidentally, as shown in FIG. 39 (D), the positional relationship between the pivotal support portion 13a of the rotation restricting portion 13 and the first hook claw 13e is reversed left and right, and the second hook claw 19 is formed on the inserter body 5 in accordance with this. In this case, the rotation restricting portion 13 may be deformed or displaced by being pushed by the rotational force Fr applied to the plunger 9. As a result, there is a possibility that the first hook claw 13e is pushed outward and detached from the second hook claw 19. Therefore, it is preferable to employ the structure shown in FIG.

Note that the hook mechanism shown in FIGS. 39A to 39D can also be applied to the first and second embodiments described above, and in that case as well, the hook mechanism shown in FIG. 39A or FIG. It is preferable to adopt the configuration shown.

(Part of the plunger structure)
A pressing plate portion 9 d is formed at the rear end portion of the plunger 9. The pressing plate portion 9d is a portion for pressing the operator's thumb when operating by the push method, and is formed to protrude in the radial direction from the plunger shaft 9a. In the pressing plate portion 9d, the surface against which the surgeon's thumb is pressed may be provided with unevenness to prevent slipping.

As described above, when the pressing plate portion 9d is provided at the rear end portion of the plunger 9, the operation by the push method becomes easy. Further, as compared with the first embodiment, the rear end portion of the plunger 9 contacts the thumb on a wider surface, so that the load applied to the thumb when the plunger 9 is pushed in is dispersed. Therefore, the burden on the thumb can be reduced.

In addition, the structure which provides the press plate part 9d in the rear-end part of the plunger 9 can be employ | adopted also in the said 1st Embodiment or the said 2nd Embodiment.

(Configuration of insertion tube)
FIG. 29 shows the structure of the insertion cylinder according to the third embodiment of the present invention, in which (A) is a plan view, (B) is a side view, and (C) is a bottom view. FIG. 30A is a perspective view of the insertion tube according to the third embodiment of the present invention as viewed obliquely from above, and FIG. 30B is a perspective view of the insertion tube as viewed from obliquely below.

The insertion cylinder 7 has a hollow insertion cylinder main body 7a and a thin tubular nozzle portion 7b, and an injection hole 7c is formed on the upper surface of the insertion cylinder main body 7a. The insertion tube body 7a is divided into a first portion 7f and a second portion 7g. The rear end portion of the insertion tube main body 7a is opened, and a hook portion 7d and a wedge portion 7e are formed around the opening portion. A cut portion 7k is formed in the nozzle portion 7b. The above points are the same as in the first embodiment.

The engaged portion 71 is formed on the lower surface side of the first portion 7f of the insertion tube main body 7a. Two

small protrusions

71a and 71b and a concave groove 71c are formed in the engaged portion 71. In the axial direction of the insertion cylinder 7, the small protrusion 71b is disposed between the small protrusion 71a and the concave groove 71c. The small protrusion 71a has a slope 71d. The slope 71d has an inclination such that the protrusion amount of the small protrusion 71a gradually increases toward the distal end side of the insertion tube 7.

A pair of left and right guide ribs 72 are formed on both sides of the second portion 7g of the insertion tube body 7a. The pair of guide ribs 72 perform a guide function for relatively positioning the insertion tube 7 and the attachment member 16 in the direction around the axis of the insertion tube 7 when the attachment member 16 is attached to the insertion tube 7. The pair of guide ribs 72 are formed so as to protrude in a wing shape from both sides of the insertion tube main body 7a (second portion 7g).

(Composition of attached members)
FIG. 31 is a perspective view of an attachment member according to the third embodiment of the present invention as viewed obliquely from above, (A) is an attachment member before being attached to the insertion tube, and (B) is an attachment after being attached to the insertion tube. The member is shown. Moreover, FIG. 32 shows the structure of the attachment member based on 3rd Embodiment of this invention, (A) is a top view, (B) is a side view, (C) is a bottom view. FIG. 33 is a view taken in the direction of arrow N in FIG. In addition, FIG. 32 has shown the attachment member before attaching to an insertion cylinder.

The attachment member 16 is a member that provides a nozzle insertion amount limiting function, as in the first embodiment. The material of the attachment member 16 is preferably a resin, more preferably a transparent or translucent resin. The attachment member 16 is preferably composed of an integrally molded product of resin. The attachment member 16 is a separate member from the insertion tube 7 and is configured to be movable with respect to the insertion tube 7. The movable direction of the attachment member 16 with respect to the insertion tube 7 is the axial direction of the insertion tube 7. In the third embodiment, after the attachment member 16 is attached to the insertion tube 7, the attachment member 16 cannot be removed from the insertion tube 7, but the attachment member 16 remains attached to the insertion tube 7. The attachment member 16 is configured to be movable in the axial direction of the insertion tube 7 (details will be described later).

A tip surface 161 as an overhanging surface is formed at the tip of the attachment member 16. The protruding surface of the attachment member 16 is a portion that directly contacts the cornea when the intraocular lens is inserted into the eye. Therefore, in order to prevent damage to the cornea as much as possible, the main body portion (excluding the protruding surface portion) of the attachment member 16 is formed of a hard resin, and the protruding surface portion is formed of a soft resin such as silicone or urethane. Good. The tip surface 161 as an overhanging surface is formed in a shape (C-shape) in which the upper part of the ring is cut out.

A viewing window 162 is formed on the top of the attachment member 16. A hole 163 is formed in the bottom of the attachment member 16. The viewing window 162 is formed so that the state of the intraocular lens 4 that moves inside the insertion tube 7 can be seen from the outside even when the attachment member 16 is attached to the insertion tube 7. The width of the viewing window 162 gradually decreases from the rear end side to the front end side of the attachment member 16 in accordance with the change in the width of the insertion tube 7. The front end side of the observation window 162 is opened without being closed, and communicates up to the notch portion of the front end surface 161. For this reason, even when the attachment member 16 is attached to the insertion tube 7, the entire portion of the insertion tube 7 from the insertion tube main body 7 a to the nozzle portion 7 b can be viewed from the outside through the viewing window 162. Accordingly, when the intraocular lens 4 is pushed out through the nozzle portion 7b of the insertion cylinder 7, the state of the intraocular lens 4 moving inside the insertion cylinder 7 can be visually recognized without being obstructed by the attachment member 16. Become.

A pair of left and right side plate portions 164 are provided on both sides of the attachment member 16. As shown in FIG. 34, slit grooves 164a are formed on the inner surface of each side plate portion 164. The slit groove 164 a is formed corresponding to the guide rib 72 of the insertion cylinder 7. FIG. 34 is a longitudinal sectional view of the attachment member 16 with the engaging portion 167 closed. A gripping portion 165 is formed on the outer surface of each side plate portion 164. The gripping portions 165 are provided on both the left and right sides of the attachment member 16 so that the surgeon or the like can grasp the attachment member 16 with the index finger and the thumb when handling the attachment member 16. The grasping portion 165 has an uneven structure so that an operator or the like can easily grasp the attached member 16.

The bridge part 166 and the engaging part 167 are provided in the rear part of the attachment member 16. The bridging portion 166 is formed on the upper portion of the attachment member 16 so as to be bridged between the pair of side plate portions 164. A part of the bridging portion 166 is formed in a waveform so as not to block the injection hole 7 c when the attachment member 16 is attached to the insertion tube 7. The bridging portion 166 is connected to the engaging portion 167 at the connecting portion 168. The connecting portion 168 is provided on one side in the left-right direction. The connecting portion 168 is formed thin so as to have appropriate flexibility. The engaging portion 167 is supported so as to be rotatable around the connecting portion 168 using the flexibility of the connecting portion 168. FIG. 33 shows a state in which the engaging portion 167 is opened, and the engaging portion 167 can be closed by rotating the engaging portion 167 in this direction in the direction indicated by the two-dot chain line arrow in the figure. When attaching the attachment member 16 to the insertion tube 7, the engaging portion 167 can be engaged with the engaged portion 71 by rotating the engaging portion 167 so as to be closed.

In the bridging portion 166, a coupling claw 169 is formed. The coupling claw 169 is formed in a protruding shape on the opposite side of the connecting portion 168 in the left-right direction. On the other hand, a coupling hole 170 is formed in the engaging portion 167 corresponding to the coupling claw 169. The coupling claw 169 and the coupling hole 170 connect the bridging portion 166 and the engaging portion 167 in a ring shape by connecting the bridging portion 166 and the engaging portion 167 on the side opposite to the connecting portion 168. Specifically, the coupling claw 169 and the coupling hole 170 are fitted and connected to each other by rotating the engagement portion 167 around the connecting portion 168 so as to be closed. Thereby, the bridge | crosslinking part 166 and the engaging part 167 can be couple | bonded cyclically | annularly. When attaching the attachment member 16 to the insertion tube 7, the bridging portion 166 is disposed on the upper side of the insertion tube body 7a (first portion 7f), and the engaging portion 167 is disposed on the lower side of the insertion tube body 7a. For this reason, the insertion cylinder main body 7 a is surrounded by the bridging portion 166 and the engaging portion 167. Moreover, in the state which couple | bonded the bridge | crosslinking part 166 and the engaging part 167, those inner peripheral surfaces become a shape corresponding to the outer peripheral surface of the insertion cylinder main body 7a.

The engaging portion 167 includes a fixed piece 171 and a movable piece 172 extending forward from the fixed piece 171. The movable piece 172 has a hole 173 formed between the movable piece 172 and the fixed piece 171. The movable piece 172 has a property (hereinafter referred to as “plate spring property”) that can be bent with the connecting portion of the fixed piece 171 and the movable piece 172 as a fixed end and the distal end 172a of the movable piece 172 as a free end. . The fixed piece 171 and the movable piece 172 are formed corresponding to the

small protrusions

71a and 71b and the concave groove 71c that constitute the engaged portion 71 of the insertion cylinder 7. The tip 172a of the movable piece 172 is configured to be able to get over the small protrusion 71a by moving along the slope 71d of the small protrusion 71a. Then, when the tip 172a of the movable piece 172 gets over the small protrusion 71a along the slope 71d, the attachment member 16 moves forward, and the protruding amount of the nozzle portion 7b changes.

A connecting bar 174 is formed on the lower portion of the attachment member 16 so as to be bridged between the pair of side plate portions 164. The connecting bar 174 is disposed so as to face the tip 172a of the movable piece 172 when the engaging portion 167 is closed. A punched hole 163 is formed in front of the connecting bar 174 in the axial direction of the attachment member 16.

(Attachment procedure of attached members)
Next, a procedure for attaching the attachment member 16 to the insertion cylinder 7 will be described. The attachment member 16 is attached in the manufacturing process (assembly process) of the intraocular lens inserter 1.

First, as shown in FIG. 35, the attachment member 16 with the engaging portion 167 opened is disposed in front of the nozzle portion 7 b of the insertion tube 7.

Next, by attaching the attachment member 16 and the insertion tube 7 relatively close to each other, the attachment member 16 is put on the outside of the insertion tube 7 as shown in FIG. At this time, the attachment member 16 is inserted to the rear end of the insertion tube 7. If it does so, it will be in the state where the nozzle part 7b protruded from the front end surface 161 of the attachment member 16 only the predetermined amount. Further, when the attachment member 16 is inserted into the insertion tube 7, the pair of guide ribs 72 formed on the insertion tube 7 is fitted into the pair of slit grooves 164 a formed on the attachment member 16 corresponding thereto. Thereby, the insertion cylinder 7 and the attachment member 16 are positioned in the direction around the axis of the insertion cylinder 7.

Next, the connecting hole 167 of the engaging portion 167 and the connecting claw 169 of the bridging portion 166 are fitted to each other by rotating the engaging portion 167 around the connecting portion 168 of the attachment member 16. Connect. Thereby, the bridge | crosslinking part 166 and the engaging part 167 are couple | bonded cyclically | annularly.

The attachment member 16 can be attached to the insertion tube 7 by the above procedure. After the attachment member 16 is attached to the insertion tube 7, the attachment member 16 cannot be removed from the insertion tube 7. That is, in the third embodiment, the attachment member 16 cannot be removed from the insertion tube 7. However, the attachment member 16 is configured to be movable with respect to the insertion tube 7. Hereinafter, this point will be described.

First, when the attachment member 16 is attached to the insertion tube 7 as described above, the small protrusion 71a, the small protrusion 71b, the concave groove 71c of the insertion tube 7, the fixed piece 171, the movable piece 172, and the connecting bar 174 of the attachment member 16 The positional relationship is as shown in FIG. That is, in the axial direction of the insertion cylinder 7, the small protrusion 71 a is disposed between the distal end 172 a of the movable piece 172 and the connecting bar 174, and the small protrusion 71 b is disposed between the distal end 172 a of the movable piece 172 and the fixed piece 171. It is arranged between. The tip 172a of the movable piece 172 is disposed in contact with (or close to) the front surface of the small protrusion 71b adjacent to the slope 71d of the small protrusion 71a, and the connecting bar 174 is in contact with the entire surface of the small protrusion 71a (or Placed in close proximity.

When moving the attachment member 16 from this state, first, an operator or the like grasps the pair of grasping portions 165 formed on both sides of the attachment member 16 with two fingers (usually an index finger and a thumb). Next, a force in the P direction is applied to the attachment member 16 while gripping the pair of grip portions 165 with a finger. Then, the movable piece 172 formed at the lower part of the attachment member 16 is deformed by the leaf spring property of the movable piece 172 itself while contacting the slope 71d of the small protrusion 71a of the insertion cylinder 7. Then, when the tip 172a of the movable piece 172 moves along the slope 71d and gets over the protruding end of the small protrusion 71a, the movable piece 172 returns to its original shape by its plate spring property.

Thereby, the positional relationship among the small protrusions 71a, the small protrusions 71b and the concave grooves 71c of the insertion cylinder 7 and the fixed piece 171, the movable piece 172 and the connecting bar 174 of the attachment member 16 is as shown in FIG. That is, in the axial direction of the insertion cylinder 7, the small protrusion 71 a is disposed between the distal end 172 a of the movable piece 172 and the fixed piece 171, and the small protrusion 71 b is also connected to the distal end 172 a and the fixed piece 171 of the movable piece 172. It is arranged between. The tip 172a of the movable piece 172 is arranged in contact (or close proximity) with the front surface of the small protrusion 71a, and the fixed piece 171 is arranged in contact (or close proximity) with the rear surface of the small protrusion 71b.

Thus, in the present embodiment, the attachment member 16 can be moved in the axial direction of the insertion cylinder 7 while the attachment member 16 is attached to the insertion cylinder 7. For this reason, the protrusion amount of the nozzle portion 7b can be changed while the attachment member 16 is attached to the insertion tube 7. Thus, an operator who prefers the procedure of inserting the nozzle portion 7b deeply into the incision of the eyeball prefers the procedure of inserting the nozzle portion 7b shallowly using the intraocular lens inserter 1 in the state shown in FIG. The surgeon can use the intraocular lens inserter 1 in the state shown in FIG. Therefore, an operator who performs cataract surgery can use the intraocular lens inserter 1 in accordance with a desired procedure.

In the third embodiment, the attachment member 16 can be moved in the axial direction of the insertion tube 7 so that the protruding amount of the nozzle portion 7b can be adjusted in two stages. However, the present invention is not limited to this. It is good also as a structure which can be adjusted to the multistep of 3 steps or more.

In the third embodiment, after the attachment member 16 attached to the insertion cylinder 7 is moved forward, the attachment member 16 is moved by contact between the tip 172a of the movable piece 172 and the small protrusion 71a. Although it is the structure which cannot return to the front position (back), you may make it the structure which can return the attachment member 16 to an original position not only this but the original.

<Modifications>
The technical scope of the present invention is not limited to the above-described embodiments, but includes forms to which various changes and improvements are added within the scope of deriving specific effects obtained by constituent elements of the invention and combinations thereof.

For example, in the above-described embodiment, the plunger 9 and the rod 10 are formed as separate members, but these can be integrated.

Moreover, in the said embodiment, although the observation window 16g was formed in the state which notched part of the attachment member 16, it is not restricted to this, A hole (not shown) with a moderate magnitude | size is not limited to this. This hole may be used as a viewing window.

In the above embodiment, the hollow body is formed by assembling the inserter body 5 and the insertion cylinder 7 to each other. However, the hollow body may have an integral structure (such as an integrally molded resin product).

In the above-described embodiment, the slider 6 is included in one of the components of the intraocular lens inserter 1. However, the slider 6 is an auxiliary element for folding the intraocular lens 4 into a desired shape. It is a member and is not necessarily required to insert the intraocular lens 4 into the eye. For this reason, for example, by devising the structure of the lens installation portion 11 in the inserter body 5 and the tip structure of the rod 10, the rod 10 can be folded into a desired shape simply by pushing out the intraocular lens 4. For example, there is no need to provide the slider 6.

DESCRIPTION OF SYMBOLS 1 ... Intraocular lens insertion device 4 ... Intraocular lens 5 ... Inserter main body 7 ... Insertion cylinder 7b ... Nozzle part 7k ... Notch part 7m ... Locking claw 8 ... Rotating member 8b ... 1st screw part 9 ... Plunger 9c ... Second screw portion 10 ... Rod 11 ... Lens installation portion 13 ... Rotation restricting portion 13d ... Retaining prevention portion 16 ... Attached member 16a ... End surface 16b ... Engaging portion 16g ... Viewing window 16i ... Tapered portion 16j ... Tongue piece 16k ... Engagement hole

Claims

A hollow body having a lens installation part in which an intraocular lens is installed;
A rotating member attached to the rear end of the hollow body so as to be rotatable about the axis of the hollow body;
A second threaded portion is formed, and a plunger that moves inside the hollow body in the axial direction of the hollow body;
A pushing member that pushes out the intraocular lens from the lens installation portion by moving the inside of the hollow body together with the plunger in the axial direction of the hollow body,
With
The front end side of the plunger is inserted into the hollow body with the first screw portion and the second screw portion meshing with each other, and the rear end side of the plunger protrudes rearward from the rotating member. Intraocular lens inserter placed in a state.
The intraocular lens insertion device according to claim 1, wherein the hollow body includes a rotation restricting portion that restricts rotation of the plunger.
The intraocular lens insertion device according to claim 1, wherein the hollow body has a retaining portion that prevents the plunger from slipping out of the hollow body.
The intraocular lens inserter according to any one of claims 1 to 3, wherein a taper angle behind the second screw portion is not less than 5 ° and not more than 15 °.
The rotation restricting portion is rotatably provided so as to open and close an opening formed in the outer wall of the hollow body,
The intraocular lens inserter according to claim 2, wherein at least a part of the rotation restricting portion is shielded by the rotating member.
The intraocular lens inserter according to any one of claims 1 to 5, wherein a pressing plate portion is provided at a rear end portion of the plunger.
The intraocular lens insertion device according to any one of claims 1 to 6, wherein an intraocular lens is installed in the lens installation unit.